Walchem ehe series Instruction Manual page 9

Electronic metering pump
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Figure 1
Flooded Suction
If flooded suction mounting is not possible, a shelf adjacent to (but not directly above) the supply
tank often works well (see Figure 2). The supply tank or cover can also be used if it has provisions
for mounting a pump (see Figure 3). In any case, the total suction lift should not exceed 5 ft (1.5m).
For extremely gaseous liquids such as Sodium Hypochlorite or Hydrogen Peroxide, pulling from an
external manifold will significantly reduce gas bubbles to the suction side of the pump. This
installation will typically solve most priming issues associated with these gaseous liquids. See Figure
4 for reference.
Figure 2
Shelf Mount
Suction Lift
Hypochlorite
Storage Tank
Figure 4
Flooded Suction for Gaseous Liquids
6
Tank Mount
Suction Lift
Sodium
Figure 3

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